Internal-combustion engine



Patented Nov. 13, I923.

RASMUS M. HVID, OF CHICAGO, ILLINOIS.

INTERNAL-COMBUSTION ENGINE.

Application filed September To all whom it may concern:

Be it known that I, RAsMUs M. I-Ivn), a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in an Internal-Combustion Engine, of which the'following is a specification.

My invention relates to internal combustion engines andparticularly to engines of the Hvid type in which liquid fuel is ignited by the heat of compression.

One of the objects of my invention is to provide means adapted for use at the time of starting such engines, for relieving the compression and simultaneously interrupting the supply of liquid fuel. The desired result may be accomplished in a plurality of forms of mechanism, only one of such forms being here illustrated and described. The fundamental purpose is to provide means operable by a single motion, for rendering inoperative the inlet or exhaust-valve-actuating devices, to the extent of retaining said valve in open position during a complete cycle of the engine and at the same time rendering inoperative the fuel inlet valve to prevent the opening of said valve in any part of the cycle.

This construction has many advantages which will readily betappreciated by those familiar with the operation of such engines. This construction assures an immediate supply of fuel to the fuel cup at the instant when compression is restored, and it obviates the danger of the fuel valve remaining open after the engine is stopped. This for the reason that in order to stop the engine it will be necessary only to throw the manually operable arm thus interrupting the supply of fuel and relieving compression in order to prepare the engine for subsequent starting.

The invention will be more readily understood by reference to the accompanying drawing wherein,

Fig. 1 is a sectional view through an engine to which my improvement has been applied, the View being taken on the line 1-1 of Fig. 2; and

Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

In the drawings a cylinder or its head,

as the case may be, is indicated at 10. The

head contains inlet and exhaust valves, the exhaust valve-stem being indicated at 11.

Serial No. 498,675.

The exhaust valve rocker is indicated at 12 and the inlet rocker at 13. These may be actuated by push-rods in the usual manner. The rockers are mounted upon a transversev shaft 14, carried by brackets 15 on the cylinder head, the shaft being provided with cams 16, 17, intermediate its ends. The exhaust valve rocker is mounted upon the cam 16 and the inlet valve rocker on the cam 17. The inlet rocker is provided with an extension boss 18 and a lug 19 projecting from the extension boss provides a con= nection for a link 20, the opposite end of which is secured at one end of a bell-crank 21, pivoted at 22 and which serves to actuate a fuel valve, the stem of which is shown at It will be seen that as the inlet valve is opened under the action of the rocker 13, the bell-crank will be oscillated and the fuel valve simultaneously opened.

An arm 24 is pinned to the shaft 1-1. and is adapted for oscillation through 911 into the dotted line position of Fig. 1. It will be seen that the position of the cams 16, 17, is such that as the arm is oscillated from the full line to the dotted line position of F i, the pivot of the exhaust valve rocker is lowered and the pivot of the inlet valve rocker is raised and moved to the left as viewed in Fig. 1. This has the efi'ect of opening the exhaust valve and rendering the fuel valve inoperative so far as subsequent opening is concerned. In this position compression is relieved and the engine-may easily be turned over until the fly-wheel has accumulated suilicient inertia whereupon the arm 24 is moved to the full line position of Fig. 1 and operation will thereafter be normal.

I am aware that it is not new to relieve compression by providing a cam on the rockerarm shaft. The novelty herein resides in the provision for simultaneous control of the compression release and the fuel shutoff. As heretofore stated the con struction is capable of modification as to details and I do not wish to be limited except as indicated in the appended claims.

I claim:

1. In an internal combustion engine, the combination of a cylinder having inlet and exhaust valves, rockers for actuating the same, a fuel valve, means connecting the inlet and fuel-valve actuating means for operation in unison, and means associated with said valve-actuating means for manually shifting the pivots of said rockers whereb to maintain said exhaust valve open and'said same, a shaft on which said rockers are mounted, a cam carried by the shaft for each rocker, the high point of said cams being substantially 180 apart, a fuel valve, actuating connectiones between the fuel valve and one of said rockers, and means for turning both of said cams through substantially 90 whereby to maintain said fuel valve in closed position and one of said first mentioned valves in open position.

3. In an internal combustion engine, the combination of a cylinder having inlet and exhaust valves, rockers for actuating the same, cams disposed substantially 180 apart on which said rockers are mounted, a fuel valve, actuating connections between the fuel valve and one of said rockers, and means combination of a cylinder, inlet and exhaust.

valves, actuating means therefor, a fuel valve, connections between the inlet and fuel valve, actuating means for operation to open said valves in unison, a pair of cams in the actuating means for said inlet and exhaust valves, and manually operable means for simultaneously moving said cams to retain said exhaust valve in open position and said fuel valve in closed position.

Signed at Chicago, Illinois, this 2nd day of September, 1921.

RASMUS M. HVID. 

